If a definition of this routine exists in several files accessible to IDLWAVE, several Source lines will point to the different files.  This may indicate that your routine is shadowing a system library routine, which may or may not be what you want (see Load-Path Shadows).  The information about the calling sequence and keywords is derived from the first source listed. Library routines are available only if you have scanned your local IDL directories or are using pre-scanned libraries (see Catalogs). The source entry consists of a source category, a set of flags and the path to the source file.  The following default categories exist:

System
A system routine of unknown origin.  When the system library has
been scanned as part of a catalog (see Catalogs), this category
will automatically split into the next two.
Builtin
A builtin system routine with no source code available.
SystemLib
A library system routine in the official lib directory !DIR/lib.
Obsolete
A library routine in the official lib directory !DIR/lib/obsolete.
Library
A routine in a file on IDL's search path !PATH.
Other
Any other routine with a file not known to be on the search path.
Unresolved
An otherwise unknown routine the shell lists as unresolved
(referenced, but not compiled).

Any routines discovered in library catalogs (see Library Catalogs), will display the category assigned during creation, e.g., NasaLib.  For routines not discovered in this way, you can create additional categories based on the routine's filename using the variable idlwave-special-lib-alist.

The flags [LCSB] indicate the source of the information IDLWAVE has regarding the file: from a library catalog ([L---]), from a user catalog ([-C--], from the IDL Shell ([--S-]) or from an Emacs buffer ([---B]). Combinations are possible (a compiled library routine visited in a buffer might read [L-SB]).  If a file contains multiple definitions of the same routine, the file name will be prefixed with (Nx) where N is the number of definitions.

Some of the text in the *Help* routine info buffer will be active (it is highlighted when the mouse moves over it).  Typically, clicking with the right mouse button invokes online help lookup, and clicking with the middle mouse button inserts keywords or visits files:

Usage
If online help is installed, a click with the right mouse
button on the Usage: line will access the help for the
routine (see Online Help).
Keyword
Online help about keywords is also available with the
right mouse button.  Clicking on a keyword with the middle
mouse button will insert this keyword in the buffer from where
idlwave-routine-info was called.  Holding down SHIFT while
clicking also adds the initial /.
Source
Clicking with the middle mouse button on a Source line
finds the source file of the routine and visits it in another window.
Another click on the same line switches back to the buffer from which
C-c ? was called.  If you use the right mouse button, the
source will not be visited by a buffer, but displayed in the online help
window.
Classes
The Classes line is only included in the routine info window if
the current class inherits from other classes.  You can click with the
middle mouse button to display routine info about the current
method in other classes on the inheritance chain, if such a method
exists there.